Interpretive Summary: A detailed, composite description of the female genital structures for the mosquito genus Elpeytonius is provided and includes an illustration of the type species of the genus. This information provides valuable new information for separating generic-level taxa of the largest tribe in family Culicidae. This work was completed at the Center for Medical, Agricultural and Veterinary entomology of the United States Department of Agriculture, Gainesville, Florida. The article will be published in the scientific journal, Contributions of the American Entomological Institute.

Technical Abstract:
A comparative, morphological analysis of the female genitalia of species included in genus Elpeytonius Reinert, Harbach and Kitching was conducted. The genitalia of the two species included in the genus, El. apicoannulatus (Edwards) and El. simulans (Newstead and Carter), are illustrated. Treatment of the genital morphology of the genus includes a composite description of the genus, a detailed description of the type species, a list of the species examined, a list of published illustrations and/or descriptions of included species with their literature citations, and a discussion. The discussion section contains a list of the most distinctive female genital features of Elpeytonius, a comparison of these with other aedine genera, and other pertinent information.